The ratio of the equivalent resistance of the network (shown in figure) between the points $a$ and $b$ when the switch is open and when the switch is closed is $x : 8$. The value of $x$ is ..... .

The effective resistance between $P$ and $Q$ for the following network is: (in $\Omega$)

Three unequal resistors in parallel are equivalent to a resistance of $1 \ \Omega$. If two of them are in the ratio $1:2$ and if no resistance value is fractional,then the largest of the three resistances in ohms is

What will be the most suitable combination of three resistors $A = 2 \, \Omega$,$B = 4 \, \Omega$,$C = 6 \, \Omega$ so that $\frac{22}{3} \, \Omega$ is the equivalent resistance of the combination?

Two wires of equal diameters with resistivities ${\rho _1}$ and ${\rho _2}$ and lengths $x_1$ and $x_2$ are joined in series. The equivalent resistivity of the combination is

Each resistance in the given cubical network has a resistance of $1 \Omega$. The equivalent resistance between points $A$ and $B$ is: